DDR3-1600CL9 costs hardly more than DDR3-1333CL9 these days, especially if you pick 4 GB modules. We took Corsair's Vengeance CMZ8GX3M2A1600C9 and compared this memory to modules by Corsair, CSX, Exceleram, GeiL, G.Skill, Kingston and Rendition ranging in size from 2 to 8 GB.